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0. E. SGRIBNER.

J'BLEPHONE CALL BOX.

' PatentedNov, 29,. 1887.

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0. E, SORIBNER. TELEPHONE CALL BOX;

No; 373,910. Patented Nov. 29, 1887.

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UNITED STATES PATENT OFFICE.

CHARLES E. SCRIBNER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE \VESTERN ELECTRIC MANUFACTURING COMPANY, OF SAME PLACE.

TELEPHONE CALL-BOX.

SPECIFICATION forming part of Letters Patent No."3'73,910, dated November 29, 1887.

Application filed December 12, 1881. Renewed September 22, 1884. Serial No. 143,736. (No model.)

To all whom it may concern:

Be it known that I, CHARLES E. SORIBNER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Iili 5 nois, have invented a certain new and useful Improvement in Gear-Switches for Telephone Call-Boxes, (Case 3st,) of which the following is a full, clear, concise, and exact description, reference being had to the accompanying draw- Io ings, forming a part of this specification.

My invention consists in'a lever or circuitchanger and the combinations hereinafter set forth, and is designed for use upon telephone call-boxes.

In the drawings, Figure 1, I have shown a front elevation of my device arranged upon a magneto-telephone call-box. Fig. 2 is a front elevation view with a diagram of the circuits ofthebell,telephone,andgenerator. Thelocal 2o circuit of the transmitter and primary of induction-coil is not shown. This local circuit may be run and connect-edwith the switch in the usual manner. Fig. 3'is a detailed view of the ring or slotted piece 0, attached to the z 5 telephone.

The telephone a is hung upon the fixed support I) by means of the ring or piece 0, which is provided with a slot or opening to receive the piece I). The lever d is pivoted at e, and

provided with the slot f. The teeth 9, forming a rack, contact-point 7a, and lugs t are arranged as shown. The lever is held against contactpoint It or Z, as the case may be, by means of a spring. When thetelephoneis supported upon 5 the hook, the circuit of the line-wire m is directed through the bell, as shown.

To remove the telephone from its support, it

is necessary to lift upward, so that the point or piece it may be brought below the stop 12,

and then to draw the telephone off the support.

In doing this the lever is drawn outwardly.

When the telephone is raised, the teeth 9 are brought down, so as to engage with the cogs of the gear-wheel, which turns the armature of 5 the generator. When the lever is drawn outwardly, as before described, it is evident that the generator will be set in motion, so that a current will be sent to line. As soon as the lugs i are brought out beyond the end of the support I), the telephone may be removed, and

is changed again to the call-bell as soon as the telephone is let down upon the support. When the teeth of thelever come against the cogs of the driving-wheel, the circuit may be traced as follows, as shown in Fig. 2. From line m to the switch d, thence to rack g, and thence to the teeth of the gear-wheel, and from the gearwheel to the pinion of the revolving armature, and thence by wire 0, through the coils of the armature, and by wire 1) tothe shaft of the pinion, which shaft is insulated, and thence from the shaft to spring q,and thence to ground,

as shown. It should be noticed that the circuit from the line m through the armature, as above traced, is unbroken during the recipro- 7 5 cations of the lever d between contacts is and Z. Therefore motion cannot be given to this lever without generating current in line m. Any other circuit may be used. For example, a sliding or frictional connection may be provided between the points 7t and k where point k may slide upon block it, asis shown in Fig. 2. Thus a signal is sent automatically to line by the generator when the telephone is placed upon or removed from its support.

My invention is of great advantage when a clearing-out annunciator is used at the central office in the circuit of two connected lines, since neither of two connected subscribers can place his telephone upon its support without 0 sending in the clearing-out signal.

I claim 1. The combination, with the ring attached to the telephone, of a reciprocating switch-1ever provided with a notch for said ring, two 5 contact-points with which said lever may be alternately connected, and the driving-wheel of the generator, and the fixed support for the telephone,,whereby the lever is brought into engagement with the driving-wheel and the cireuits changed automatically when the telephone is placed upon or removed from the fixed support, as and for the purpose specified.

2. The combination of telephone a, support 1), ring 0, lever (I, provided with lugs 1', pin or pivot e, slot f, and teeth 9 with the driving wheel of the generator of a telephone call-box.

3. The combination, with the telephone-line circuit permanently connected with the reeiprocating switch-lever, of the contact connecting through the bell and generator coils and the contact connecting through the telephone, of the telephone and gearing, the telephone being adapted to reciprocate the lever, whereby the circuit is changed and current generated and sent to line automatically on the removal of the telephone and the telephone brought into circuit, substantially as specified.

4. The combination, with the ring attached to the telephone, of the switch-lever adapted to be moved thereby and the armature ol' the generator and the gear-wheel, whereby the generator is operated automatically on taking down the telephone, substantially as specified;

5. The combination of the lever provided with teeth, the cogs of the gear-wheel of the generatouand the r1 mg or slotted piece attach ed to the telephone, whereby the teeth of the le ver are brought into engagement with the cogs of the geanwhcel, substantially as specified.

6. In a telephone call-box, the combination, with the magneto-generator, of a reciprocating switch connected with the armature of the gen erator and the telephone, whereby the generator is operated on the removal of the telephone from the switch, substantially as and for the purpose specified.

7. The combination, with the reciprocating switch-lever and the armature of the generator, of the line-circuit, including said switch and said generator, the telephone, and engaging mechanism between the said reciprocating lever and the generator, whereby the armature is moved as the switch is reciprocated, while the current generated thereby is directed to line.

CHARLES E. SCRIBNER.

\Vitnesses:

GEORGE P. BARTON, WILLIAM S. GRANGER. 

